Skin on hands and feet is usually dryer than skin on other body parts, this is due to a difficult blood circulation in those areas, because of the distance from the heart.
During winter skin gets damaged easily especially due to the cold weather. Cold causes a vasoconstriction, blood vessels reduce their volume in feet and hands. In this situation skin doesn’t get properly nourished, has difficulties in producing fat and so gets very dry.
Excessive sweating occurs when sweat glands start working excessively due to hot temperature, stress or emotional situations.
Fissures are long, narrow cracks that develop on the horny layer or deeper layers of the skin; they are caused by dryness, insufficient skin nutrition, the use of aggressive detergents and drugs, and so on.
Dyshidrosis is a form of psoriasis that appears as blisters and scales on the feet. Dyshidrosis is usually itchy.
Washing your hands frequently and with detergents, soaps or even dealing with dish and laundry soap can cause a loss of lipids.
Dermatitis due to detergents looks like aquagenic dermatitis. Some industrial (and even some domestic) detergents contain protein-digesting enzymes that are also capable of attacking human skin.
Aquagenic dermatitis is a form of dermatitis caused by water that appears on areas of the body that are in continuous contact with water or dampness.